145040121 has 6 divisors (see below), whose sum is σ = 209502410. Its totient is φ = 96693408.

The previous prime is 145040089. The next prime is 145040143. The reversal of 145040121 is 121040541.

It can be written as a sum of positive squares in only one way, i.e., 73874025 + 71166096 = 8595^2 + 8436^2 .

It is not a de Polignac number, because 145040121 - 2⁵ = 145040089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145040094 and 145040103.

It is not an unprimeable number, because it can be changed into a prime (145040221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8057776 + ... + 8057793.

Almost surely, 2^145040121 is an apocalyptic number.

It is an amenable number.

145040121 is a deficient number, since it is larger than the sum of its proper divisors (64462289).

145040121 is a wasteful number, since it uses less digits than its factorization.

145040121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16115575 (or 16115572 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 145040121 is about 12043.2603974173. The cubic root of 145040121 is about 525.4072377692.

Adding to 145040121 its reverse (121040541), we get a palindrome (266080662).

It can be divided in two parts, 145040 and 121, that added together give a square (145161 = 381²).

The spelling of 145040121 in words is "one hundred forty-five million, forty thousand, one hundred twenty-one".